Reinterpreting an Image from const char* data[] and unsigned int [solved]

beginners
#1

I receive some Images from a database that returns them as:

const unsigned char* buffer[];
unsigned int saved_size;

The images are png 320x240; RGB

and the size that is returned is 105791

I am trying to make them back into an ofImage;

The images are uploaded to the database after saving them with standard ofSaveImage()

ofSaveImage(vidGrab->getPixels(), ofToDataPath(project_directories.GENERAL_SETTINGS+"/GRAB.png"));

is it possible to turn it back into an image?

#2

ok I’ve figured it out…

ofBuffer to ofTexture

ofTexture to ofPixels

ofPixels to ofImage

simple :blush:

                    ofBuffer buf;
                    buf.set(*(buffer), saved_size);
                    ofTexture texture;
                    ofLoadImage(texture, buf);
                    ofPixels pixels;
                    texture.readToPixels(pixels);
                    img.setFromPixels(pixels);
#3

you can just do:

ofBuffer buf;
buf.set(*(buffer), saved_size);
ofImage img;
img.load(buf);

which should be faster than going through a texture and then downloading again to an image

1 Like
#4

Or if you just need to draw it you can just use a texture without an image and draw that:

ofBuffer buf;
buf.set(*(buffer), saved_size);
ofTexture texture;
ofLoadImage(texture, buf);


...

texture.draw(0,0);
3 Likes